Blazon Digital Media Presents The 3m 9004v,A Dust Mask Composed Of Three Layers Of Filters. The Outermost Layer Filters Out The Largest Dust Particles, The Innermost Layer Preserves The Respirators Shape And The Middle Layer Is Composed Of Electrostatic Filter Media.Manufactured In A Cup Shape, This Mask Has An Aluminium Nose Clip And Elastic Bands That Let You Wear It Comfortably. You Can Easily Fold This Mask When You Are Not Using It And Store It In Your Apron Pocket. It Has The Ability Of This Respirator Mask To Filter Above 90% Of 0.3-Micron Particulate Dusts.?(Scientific Research Has Proven Thatfor All Dust Particles Sizes, 0.3 Micron Dust Are The Most Difficult To Filter Effectively).?This 3m Mask Is Used As A Disposable Face Mask For Respiratory Protection Against Fine Dust Particles. It Is A Bestselling Safety Mask In 3m Safety Products Line. 3m 9004v Mask Has A Cup Shape Design And Comes With Aluminum Nose Clip & Neoprene Elastic Band For Comfortable Fitting On Every Face.Always Watch Out For Blazon Digital Media Id On Flipkart For Your Genuine And 100% Orriginal Buy..

can't be used for longer days as I am suffering from nostril bleeding after using it for 1 month. the exhaled air does not passes out completely from the mask. thus making the inside chamber hot causing the nostrils to dry enough to bleed. this problem needs to be resolved.